Found in the December 1974 issue of Radio Electronics, this circuit is similar to the previous one, only using another TTL counter. The circuit must be powered by 5 V.
We found this control circuit for three-phase motors used in the control of doors and gates in a...
This extremely slow circuit produces one pulse per month and can be used in a timer. We found it...
This circuit is from an American publication of 1977. The tunnel diode admits equivalents and the...